Looking thru receipts from autozone over the past two weeks, here is what everything costs from Autozone (all CRX items are for a SI):

Brake Rotors ('88-'91 CRX) - $12.99/ea
Brake Pads ('89 CRX) - $24.99/fronts
Brake Pads ('90 CRX) - $17.99/fronts
Front Brake Calipers ('89 CRX) - $28.99/ea ($20 core)
Front Brake Calipers ('90 CRX) - $40.99/ea ($35 core)
Rear Drum Wheel Cylinders ('89 CRX) - $12.99/ea
Brake Booster ('90 CRX) - $63.97 ($56 core)
Brake Booster ('90 Integ) - $135.97
Brake Master Cylinder ('90 Integ) - $53.99

Add on this list if you have confirmed receipts/prices.

I wanted to create a reference to prices. These shouldn't change much.